“The Mercedes-Benz 300SL Alloy Gullwing and Ferrari LWB California Spider we're offering are extraordinary automobiles which have become must-have inclusions in many top collections,” the auction house's president and founder David Gooding said in a company statement. “It's been nearly five years since an Alloy Gullwing has surfaced for public sale, and this desirable, late-production California Spider equally represents an exciting opportunity for those in the market.”

This particular Ferrari LWB California Spider is claimed to be the 36th of 50 built by the Italian company in 1959. It is equipped with disc brakes, a competition-inspired cold air box with velocity stacks and Scaglietti coachwork, according to the auction house. The white California Spider also has a certificate of authenticity from Ferrari's Classiche department. It has an estimated price range of $3.4 million to $3.8 million.

The 1955 Alloy Gullwing for auction is one of only 29 alloy-bodied 300SL models built by Mercedes-Benz. The factory lightweight was built with racing intent and includes a high-performance motor, Rudge wheels and stiff suspension, according to Gooding & Co. The matching-numbers Gullwing was restored by 300SL expert Rudi Koniczek and won its class in the Kirkland Concours d'Elegance. Preauction estimates price the Alloy Gullwing at $2.5 million to $3 million.